Update docs

BUILD.md

@@ -17,14 +17,14 @@
 
 ## Compiling modules
 
-### CLI (test.exe) / Winamp plugin (in_vgmstream) / XMPlay plugin (xmp-vgmstream)
+### CLI (test.exe/vgmstream-cli) / Winamp plugin (in_vgmstream) / XMPlay plugin (xmp-vgmstream)
 
 **With GCC**: use the *./Makefile* in the root folder, see inside for options. For compilation flags check the *Makefile* in each folder.
 You need to manually rebuild if you change a *.h* file (use *make clean*).
 
-In Linux, Makefiles can be used to cross-compile with the MingW headers, but may not be updated to generate native code at the moment. It should be fixable with some effort.
+In Linux, Makefiles can be used to cross-compile with the MingW headers, but may not be updated to generate native code at the moment. It should be fixable with some effort. Autotools should build it as vgmstream-cli instead (see the Audacious section).
 
-Windows CMD example for test.exe:
+Windows CMD example:
 ```
 prompt $P$G$_$S
 set PATH=C:\Program Files (x86)\Git\usr\bin;%PATH%
@@ -91,24 +91,24 @@ Windows builds aren't supported at the moment (should be possible but there are
 
 Terminal example, assuming a Ubuntu-based Linux distribution:
 ```
-# get libraries
+# build requirements
 sudo apt-get update
-
-sudo apt-get install audacious
-
-sudo apt-get install git
 sudo apt-get install gcc g++ make
 sudo apt-get install autoconf automake libtool
-sudo apt-get install audacious-dev libmpg123-dev libvorbis-dev libglib2.0-dev libgtk2.0-dev libpango1.0-dev
+sudo apt-get install git
+# vgmstream dependencies
+sudo apt-get install libmpg123-dev libvorbis-dev
+# Audacious player and dependencies
+sudo apt-get install audacious  
+sudo apt-get install audacious-dev libglib2.0-dev libgtk2.0-dev libpango1.0-dev
 
-# check audacious version
+# check Audacious version >= 3.5
 pkg-config --modversion audacious
 
+# build
 git clone https://github.com/kode54/vgmstream
 cd vgmstream
 
-
-# build
 ./bootstrap
 ./configure
 make -f Makefile.audacious
@@ -117,7 +117,7 @@ make -f Makefile.audacious
 sudo make -f Makefile.audacious install
 
 
-# post-cleanup
+# optional post-cleanup
 make -f Makefile.audacious clean
 find . -name ".deps" -type d -exec rm -r "{}" \;
 ./unbootstrap
@@ -125,6 +125,12 @@ find . -name ".deps" -type d -exec rm -r "{}" \;
 git clean -fd
 ```
 
+# vgmstream123 player
+Should be buildable with Autotools, much like the Audicious plugin, though requires libao (libao-dev).
+
+Windows builds aren't supported at the moment (source may need to be adapted for non-POSIX systems).
+
+
 ## Development
 
 ### Code
@@ -146,7 +152,7 @@ There are no hard coding rules but for consistency should follow general C conve
 ./src/coding/        format data decoders
 ./src/layout/        format data demuxers
 ./src/meta/          format header parsers
-./test/              test.exe CLI
+./test/              CLI tools
 ./winamp/            Winamp plugin
 ./xmplay/            XMPlay plugin
 ```
@@ -226,6 +232,22 @@ Every call the decoder will need to find out the current frame offset (usually p
  
 If the decoder needs to keep state between calls it may use the VGMSTREAM for common values (like ADPCM history), or alloc a custom data struct. In that case the decoder should provide init/free functions so the meta or vgmstream may use. This is the case with decoders implemented using external libraries (*ext_libs*), as seen in *#ifdef VGM_USE_X ... #endif* sections.
 
+Adding a new decoder involves:
+- *src/coding/(decoder-name).c*: create `decode_x` function that decodes stream data into the passed sample buffer. If the codec requires custom internals it may need `init/reset/seek/free_x`, or other helper functions.
+- *src/coding/coding.h*: define decoder's functions.
+- *src/vgmstream.h*: define new coding type in the list. If the codec requires custom internals, define new `x_codec_data` struct.
+- *src/vgmstream.c: reset_vgmstream*: call `reset_x` if needed 
+- *src/vgmstream.c: close_vgmstream*: call `free_x` if needed
+- *src/vgmstream.c: get_vgmstream_samples_per_frame*: define so vgmstream only asks for N samples per decode_x call. May return 0 if variable/unknown/etc (decoder must handle setting arbitrary number of samples)
+- *src/vgmstream.c: get_vgmstream_frame_size*: define so vgmstream can do certain internal calculations. May return 0 if variable/unknown/etc, but blocked/interleave layouts will need to be used in a certain way.
+- *src/vgmstream.c: decode_vgmstream*: call `decode_x`, possibly once per channel if the decoder works with a channel at a time.
+- *src/vgmstream.c: vgmstream_do_loop*: call `seek_x` if needed
+- *src/vgmstream.c: reset_vgmstream*: call `reset_x` if needed
+- *src/formats.c*: add coding type description
+- *src/libvgmstream.vcproj/vcxproj/filters*: add to compile new (decoder-name).c parser in VS
+- *src/vgmstream.c*: add parser init to the init list
+- if the codec depends on a external library don't forget to mark parts with: *#ifdef VGM_USE_X ... #endif*
+
 #### core
 The vgmstream core simply consists of functions gluing the above together and some helpers (ex.- extension list, loop adjust, etc). 
 

README.md

@@ -4,11 +4,12 @@ This is vgmstream, a library for playing streamed (pre-recorded) audio
 from video games.
 
 There are multiple end-user bits:
-- a command line decoder called "test.exe"
+- a command line decoder called "test.exe/vgmstream-cli"
 - a Winamp plugin called "in_vgmstream"
 - a foobar2000 component called "foo_input_vgmstream"
 - an XMPlay plugin called "xmp-vgmstream"
 - an Audacious plugin called "libvgmstream"
+- a command line player called "vgmstream123"
 
 Help and newest builds can be found here: https://www.hcs64.com/
 
@@ -27,10 +28,10 @@ Put ```libvorbis.dll```, ```libmpg123-0.dll```, ```libg7221_decode.dll```, ```li
 ```avutil-vgmstream-56.dll``` and ```swresample-vgmstream-3.dll``` somewhere Windows can
 find them.
 
-For Winamp/XMPlay/test.exe this means in the directory with the .exe, or in a
+For Winamp/XMPlay/command line this means in the directory with the main .exe,
-system directory, or any other directory in the PATH variable.
+or in a system directory, or any other directory in the PATH variable.
 
-### test.exe
+### test.exe/vgmstream-cli
 ```
 Usage: test.exe [-o outfile.wav] [options] infile
 Options:
@@ -77,6 +78,9 @@ Every file should be installed automatically by the .fb2k-component bundle.
 ### Audacious plugin
 Needs to be manually built. Instructions can be found in the build document.
 
+### vgmstream123
+Needs to be manually built. Instructions can be found in the build document.
+
 ## Supported codec types
 Quick list of codecs vgmstream supports, including many obscure ones that 
 are used in few games.
@@ -127,6 +131,7 @@ are used in few games.
 - Bink
 - AC3/SPDIF
 - Xiph Opus (Ogg, Switch)
+- Musepack
 - FLAC
 - Others